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In summer, the most common fruit that people eat and think is the best is watermelon. Watermelon conquers all of us with its bright red melon pulp and sweet juice.
But why is there so much sweet juice in the "belly" of a watermelon, and what use will this be for a watermelon?
This starts with the hometown of watermelons. Watermelons are originally grown in the deserts of southern Africa. When the watermelon is ripe, it needs to spread its seeds to all directions, so that they can "find" the place where they grow.
The watermelon's round shape allows it to roll far away with the desert winds.
When a watermelon is blown to a distant place by a strong wind, its skin will crack and the seeds will flow down the juice to the ground; It doesn't matter if there are birds and beasts eating watermelons, melon seeds will not be digested when they reach the stomachs of birds and beasts, it will be excreted with the feces of birds and beasts, fall to the ground, and immediately sprout and grow quickly.
Ripe watermelons are lighter in weight, and if they are flooded during the rainy season, they can drift further away to grow.
From this point of view, the large amount of sweet juice in the "belly" of watermelon is not prepared for us humans, but the milk given to the seeds by the "mother" of the melon.
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Because there is a peel on the outside and the flesh on the inside.
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In summer, watermelon is very popular for people to eat to clear heat, quench thirst, and cool off. Fruit too. Watermelon is sweet and delicious, and it tastes very good, so everyone has eaten watermelon, but do you know why watermelon has a lot of red juice?
Let me give you an answer.
Watermelons were originally grown in tropical regions with dry climates.
There wasn't as much juice as there is now, and the flavor wasn't as sweet. In order to survive, it grows into a sweet fruit, so that birds and beasts who like to blow sweet fruits come to eat it.
After eating, they carry the seeds of the watermelon to a far away place on the stool, so that the watermelon can grow farther away.
Later, people cultivated and improved the varieties of watermelon, and slowly cultivated into new varieties, which are not only juicy and delicious, but also large in size, becoming the best fruit in midsummer.
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Because the vacuoles of the cells in the watermelon pulp are large.
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From a chemical point of view: contains a lot of sugar and water. From the point of view of natural selection; Sweet juice can lure other creatures to feed, help it spread its seeds, and help expand the territory of its offspring.
In terms of artificial selection: the earliest watermelon was not as big as the current watermelon, nor as sweet as it, which is the result of human planting choices for thousands of years, especially in recent decades, the application of biological science has made it so. From a biological point of view, the cell wall of the pulp in the watermelon is very thin, and there is a lot of cell sap When you eat it, it is juicy Watermelon accumulates more sugar during the daytime and when it acts and watermelon originally grew in sunny places, such as Xinjiang in China, so watermelon is sweet and juicy
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Because watermelon is determined by genes, genes determine its shape, type, and juice content. You can take a look at high school biology books, they all have it...
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Because watermelons evolved in an arid environment, those with less juice died of thirst.
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Watermelon cells contain (a lot of water) and (a lot of sugar).
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Watermelon Zhicha was originally grown in the tropical regions with a dry climate, and the juice was not as much as it is now, and the taste was not so sweet. In order to survive, it grows into a sweet fruit, so that those birds and beasts who like to blow sweet fruit come to eat its dregs. After eating, they put the watermelon.
The seeds are carried far away, allowing the watermelon to grow even further.
Later, people cultivated and improved the varieties of watermelon, and slowly cultivated into new varieties, which are not only juicy and delicious, but also large, becoming the best fruit in midsummer.
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